Norgren pneuflex polyurethane spring coil compressed air hose norgren pu310800428 a range of polyurethane spring coil hoses with nickel plated brass swivel fittings at both ends the hoses have a high degree of flexibility making them suitable for high mechanical deformation use on compressed air systems for machine tools etc norgren pneuflex pu310800428 pu spring coils 4m 8 x 5mm hose r14 thread